Fragmentation of SU(2)-invariant spin ladders

Details Fragmentation of SU(2)-invariant spin ladders Fragmentation of SU(2)-invariant spin ladders

2001-02-20

arxiv.org/abs/cond-mat/0102355v1

Physics

Condensed Matter

Strongly Correlated Electrons

22 pages, including 2 tables. Revtex

Scientific paper

A two-parameter family of quantum spin ladders with local bilinear and biquadratic interactions is shown to be solvable by a mapping onto fragments of integrable spin 1 chains. The phase diagram, consisting of four phases, and the ground state properties are discussed. In one novel phase, the ground state is made up of plaquette singlets and rung singlets, alternating with a three-rung periodicity.

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